Ethylenediamine → 5-{3-(cyanomethyl)-3-[4-(1H-pyrrolo[2,3-b]pyridin-4-yl)-1H-pyrazol-1-yl]azetidin-1-yl}-N-isopropylpyrazine-2-carboxamide

Participants

Reaction Steps

N,N-Diisopropylethylamine (19 μL, 0.11 mmol) was added to a mixture of 5-{3-(cyanomethyl)-3-[4-(1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[2,3-b]pyridin-4-yl)-1H-pyrazol-1-yl]azetidin-1-yl}pyrazine-2-carboxylic acid (19.4 mg, 0.0365 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (19 mg, 0.044 mmol) and 2-propanamine (3.2 mg, 0.055 mmol) in DMF (1.0 mL). The reaction mixture was stirred at room temperature overnight. The reaction mixture was worked up with saturated aqueous NaHCO3, and extracted with dichloromethylene (3×20 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was treated with methylene chloride (1.3 mL) and TFA (1.3 mL). The mixture was stirred at room temperature for 1.5 h., and concentrated under reduced pressure. The residue was dissolved in methanol (1.3 mL), and treated with ethylenediamine (0.086 mL, 1.3 mmol). The resulting mixture was stirred at room temperature for 2 h, and then purified by RP-HPLC (pH=10) to afford the desired product. LCMS (M+H)+: m/z=442.1. 1H NMR (400 MHz, DMSO-d6): δ 12.19 (br, 1H), 8.99 (s, 1H), 8.66 (d, J=1.4 Hz, 1H), 8.47 (s, 1H), 8.32 (d, J=5.7 Hz, 1H), 8.14 (d, J=8.4 Hz, 1H), 8.00 (d, J=1.4 Hz, 1H), 7.67 (dd, J=3.2, 2.7 Hz, 1H), 7.54 (d, J=5.5 Hz, 1H), 7.09 (dd, J=3.5, 2.7 Hz), 4.82 (d, J=10.0 Hz, 2H), 4.56 (d, J=10.0 Hz, 2H), 4.10 (m, 1H), 3.79 (s, 2H), 1.17 (d, J=6.4 Hz, 6H).

Provenance & Evidence